fix containsChunk for region-style levels ( thought this was already fixed... )
fix containsChunk for region-style levels ( thought this was already fixed... )

ahh2131/mchisel,arruda/pymclevel,ahh2131/mchisel,mcedit/pymclevel,arruda/pymclevel,mcedit/pymclevel,codewarrior0/pymclevel,codewarrior0/pymclevel